Mechanical movement and printing-press involving the same.



W. K. HODGMAN, JR- MECHANICAL MOVEMENT AND PRINTING PRESS INVOLVING THESAME.

APPLICATION FILED SEPT. 8, I917- Patented Apr. 29, 1919.

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W. K. HODGMAN, JR. MECHANCAL MOVEMENT AND PRINTING PRESS INVOLVING THESAME.

APPLXCATION FILED SEPT. 8, 1917 v Patented Apr. 29, 1919.

4 SHEETSSHEET 2 PaIented Apr. 29, 1919.

4 SHEETS-SHEEI 3.

W. K. HODGMAN, JR. MECHANICAL MOVEMENT AND PRINTING PRESS INVOLVING THESAME.

APPLICATION FILED SEPT.8. I917.

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mam Ja W. K. HODGMAN, In. MECHANICAL MOVEMENIAND PRINTING PRESSiNVOLVING THE SAME.

APPLICATION FILED SEPT. 8.1917- 4 SHEETS-SHEET 4 Egg? WILLIS K.HODG-MAN, JR., OF TAUNTON', MASSACHUSETTS.

MECHANICAL MOVEMENT AND PRINTING-PRESS INVOLVING THE SAME.

Specification of Letters Patent.

Patented Apr. Qifid, 191%.

Application filed September 8, 1917. Serial No. 190,317.

To all whom it may concern:

Be it known that I, WILLIS K. HODGMAN, J12, a citizen of the UnitedStates, and a resident of Taunton, in the county of Bristol and State ofMassachusetts, have'invented an Improvement in Mechanical Movements andPrinting-Presses Involving the Same, of whichthe following description,in connection with the accompanying drawings, is a specification, likecharacters on the drawings representing like parts.

This invention relates to a mechanical movement capable of use in manyand varying relations and also to printing presses as illustrative ofone application of such mechanical movement and wherein such movementhas peculiar advantages.

In order that the principle of the invention may be readily understood,I have dlsclosed a single type or embodiment thereof in the accompanyingdrawings, wherein Figure 1 is a view in longitudinal section of aprinting press embodying my invention and having applied to andincorporated therein the mechanical movement also constituting a portionof my invention, both ends of the press being broken away;

' Fig. 2 is a plan View of the construction shown in Fig. 1;

Fig. 3 is a. view partly in end elevation and partly in transversesection of the construction shown in Fig. 1;

Fig. 4 is a detail showing certain of the parts represented in Fig. 1,but differently positioned; n I

Fig. 5 is a transverse section upon the hue 55 of Fig. i; and

Fig. 6 is a longitudinal section upon the line 6-6 of Fig. 4.

My invention in part comprehends a mechanical movement per se and whichis capable of use in many different relations, and it also comprehends aprinting press embodying and having incorporated therein such mechanicalmovement, inasmuch as such movement peculiarly functions with. a printing press in fiecting the movements thereof. I shall therefore proceedto describe a printing press having embodied therein such mechanicalmovement without, however, li1n1ting the scope of the invention to aprinting press. The printing press herein represented is of theso-called two revolution bed and cylinder type. It is, however,distinctly to be understood that my invention may be applied not only toother mechanisms and apparatus than printing presses but also that itmay be applied to other types of printing presses than that represented.

Referring briefly to the mechanical movement herein disclosed, withoutlimiting the same thereto, I desire to point out that it is peculiarlyadapted for converting rotary motion into rectilinearly reciprocatingmotion 1n a reciprocable member andfor producing rotary motion,preferably but not necessarily intermittent, in one direction in arota-table member, so that the surface speed of the said rotatablemember shall conform at all times in degree to that of the said reber'oftypes of rotating members that may be employed.

Before proceeding to describe in detail the disclosed application of myinvention, I will point out certain characteristic movements of a tworevolution bed and cylinder printing press in order that the peculiarapplicability thereto of the disclosed mechanical movement may beappreciated.

In the usual operation of a printing press of the disclosed type, thebed is propelled first in one and then in the opposite direction at auniform speed, the direction of motion of the bed being reversed at theend of the uniform speed portion of its travel by gradually slowing downthe movement of the bed in the one direction until it is brought to restand by then gradually accelerating its movement in the oppositedirection until it is brought up to the said uniform speed which ismaintained until a gradual slowing down is effected toward the end ofits movement in the other direction. The cylinder of the press in themeantime rotates in one direction and in the disclosed embodiment of myinvention such rotation is periodically stopped as will be hereinaftermore fully set forth. The speed of rotation of the cylinder in a tworevolution bed and cylinder printing press is normally that of the saiduniform speed of the bed. During the printing stroke of th bed, thesurfaces of the bed and cylinder are then traveling for a time at thesame saeed and therefore paper carried on the surface of the cylindermay be pressed with a rolling action agalnst a printing surface carriedby the bed. During the return movement of the bed and also during theprinting stroke in the periods of accelerated and retarded speedimmediately preceding and following the described uniform speed portionof the stroke of the bed, the surface of the cylinder and printingsurface carried by the bed must be separated in two revolution bed andcylinder printing presses of previously existing types.

By incorporating in a printing press of the two revolution bed andcylinder type, the mechanical movement of my invention, I obtain certainadvantages which will be referred to or made fully evident hereinafterbut certain of which I will now briefly set forth.

By adapting and applying the said mechanical movement to a printingpress of the two revolution bed and cylinder type, the printing can bedone during any part of the printing stroke of the bed clear to theactual sto 3 of the bed at the end of its printing stro (e, and is notlimited to the uniform speed portion of the stroke of the bed. More ofthe complete cycle may be utilized to reverse the direction of motion ofthe bed, thus reducing the strain on the parts. The total stroke of thebed may be cut down in length due to the fact that printing may takeplace up to the arrival of the bed on dead center. The cylinder of thepress may be reduced in diameter due to the shorter stroke of the bed,and due also to the fact that the surface speed of the cylinder variesat all times with that of the bed The gripper action may be made tooperate and preferably is made to operate While the cylinder is runningat less than said uniform speed. For the foregoing reasons, the printingress is capable of considerably increased speed over the usual type oftwo revolution bed and cylinder press.

I have herein disclosed a sheet delivery and its relation to the saidmechanical movement of my invention which is such that the sheet isstopped so that it may be piled while stopped, inasmuch as the sheetdelivery stops with the press on dead center, and therefore at exactlythe right time to effect such described sheet piling.

I am enabled in the practice of my invention to eliminate considerableweight of material since my press is shorter and lower than the usualtwo revolution press and also because the easier reversal in movementthereof does not necessitate so much dead weight in the frame to absorbthe inertia of the bed movement. I "am also enabled to do away with manyparts heretofore employed in effecting the 'bed motion such for exampleas cams, springs, swinging shoes, universal joints and sliding gears.

By reason of the employment of the said mechanical movement in aprinting press of the two revolution type, all the time between thebeginning of a printing stroke and the beginning of actual printing isavailable to register the cylinder with the bed instead of the veryshort time allowed on the usual two revolution press. Furthermore sincethe driving shaft runs at a speed permitting it to be belted to direct,no auxiliary driving shaft is required, and I am thus enabled toeliminate mechanism and to reduce the amount of floor space heretoforerequired with two revolution bed and cylinderpresses.

These and other advantages accrue from the employment of the saidmechanical movement in a tworevolutioii bed and cylinder printing press,but as previously stated, my invention is in no wise limited to such useor adaptation of the said mechanical movement.

Without in any wise limiting my invention thereto, 1 will now proceed todescribe in detail a two revolution bed and cylinder printing presshaving the said mechanical movement of my invention applied thereto, andwill set forth certain slight variations in type of such character ofpress without, however, attempting to disclose all forms or types ofsuch general character of press to which the said mechanical movementmay be applied.

Referring more particularly to the drawings, the drive shaft isindicated in the vari ous views at 1, it being driven in any suitablemanner from any suitable source of power as for example by theemployment of a combination fly wheel pulley 2 mounted thereon. The saidshaft is mounted in suitable bearings not necessary particularly torefer to.

Fast upon the inner end of the said drive shaft 1 is a gear 3 shown mostclearly in Fig. 5 and which I term the bed driving shaft gear. Looselymounted upon the said shaft 1 and preferably adjacent to said gear 3 isa crank or crank arm 4 which may partake of any suitable form or shapeand which carries a crank pin 5 fast thereon. Rotatable upon the saidcrank pin 5 is a bed driving gear 6 preferably of the width indicated inFigs. 5 and 6, so that it may mesh both with the bed driving shaft gear3 and with the endless bed rack, a portion of which is indicated at 7The reciprocable bed of the press is indicated at 8 and to the latterare secured the outer reversingcshoes 9, 10 and the rack hanger 11 whichcarries the inner reversing shoes 12, 13, as well as the said endlessbed rack 7.

Rotatable upon the crank pin 5 is a socalled reversing roller 14, whichat either end of the movement of the bed enters between the inner andouter reversing shoes thereat.

Preferably I provide suitable means cooperating with said crank arm 4and related parts to maintain the same in position during the uniformspeed portion of the travel of the bed. For this purpose I have hereinrepresented a locking strip 15 secured to the rack hanger 11 andextending longitudinally of the bed. With said locking strip are adaptedto engage at the proper time looking members or rollers 16, 16, 17, 17,which are fast in airs to the crank arm 4, as clearly indicate in Fig.4.

The bed 8 of the press is supported in any suitable manner as forexample on sets of bed rollers 18,18 moimt-ed on tracks or ways 19, 19,19, forming a part of the frame work of the printing press.

The bedS has fast thereto a longitudinally extending rack 20constituting a cylinder driving rack and which meshes with a cylinderdriving shaft gear 21 shown most clearly in Fig. 2. The said gear 21 isloose upon a cylinder driving shaft 22 mounted in bearings 23, 23, 23".Said cylinder driving rack 20 also meshes with an. auxiliary cylinderdriving shaft gear 24, which is fast on an auxiliary cylinder drivingshaft 25 ,n'iounted in bearings 26, 26 in parallelism with the cylinderdriving shaft 22. The said auxiliary cylinder driving shaft 25 has alsofast thereon an auxiliary cylinder driving shaft gear 27 which mesheswith a cylinder driving shaft gear 28 loosely mounted on the cylinderdriving shaft Either of the cylinder driving shaft gears 21 or 28, whichit will be observed are rotated in opposite directions, may be madetemporarily fast to the cylinder driving shaft 22 in any suitable mannerand preferably'by a toothed clutch indicated generally at 29 in Fig. 2.Tie said clutch is slidably mounted upon the cylinder driving shaft 22but is not rotatable relatively thereto. Any suitable means may beprovided to slide saidclutch upon the shaft 22. For the purpose I haveherein represented in Fig. 3 a clutch yoke 30 carried by a clutch lever31 pivoted centrally at upon the framing of the machine and 7 havingpivotally connected to its outer end at a link 34 pivotally connected at35 to a lever 36 pivoted at 37 upon the framing of the machine andhaving at its inner end a roller 38 engaging the groove in a cam 39 fastupon the sleeve of crank arm 4.

The cylinder driving shaft 22 has fast upon its outer end a cylinderdriving gear 40 shown in Figs. 2 and 3, and which meshes with a cylindergear 41 fast to the shaft 42 of the impression cylinder 43.

During the engagement of the bed driving gear 6 with either of thestraight sections of the endless bed rack 7, the bed 8 of the press isdriven at a uniform speed in one direction or the other and the lockingstrip 15 engaging with the locking rollers 16, 17 holds the crank 4 sothat a vertical line through the center of the crank pin 5 thereof alsopasses through the center of the driving shaft 1, as is clearly evidentfrom Fig. 4. At the same time one or the other of the cylinder drivingshaft gears 21, 28 is fast to the cylinder driving shaft 22 so that theim pression cylinder 43 is rotated in the desired direction and at thesame surface speed as that of the bed 8. When the bed 8 has moved alonguntil one or the other of the curved ends of the endless bed rack 7 hasbeen reached, the locking strip 15 passes from between the lockingrollers 16, 17, so

that the crank 4 is free to rotate upon the driving shaft 1, and doesrotate in the same direction of rotation as the said driving shaft 1,the said bed driving gear 6 meshing with the teeth in the curved end ofthe endless bed rack 7, and the reversing roller 14 being engagedbetween one or the other of the outer reversing shoes 9, 10 and itscorresponding inner reversing shoe 12, 13. For the first part of therotating movement of the crank 4, the motion of the bed is continued inthe same direction in which it had been going, but the speed thereof isgradually diminished until the bed is stopped at the time the reversecurved part 44 of the endless bed rack, the reverse curved part of theinner shoe and the corresponding reverse curved part 45 of the outerreversing shoe, represented in this form of my invention, have beenreached. While my invention is in no wise limited thereto, I preferablyprovide said reverse curved portions 44, 45 and the correspondingreverse curved portion of the inner shoe, so as to prolong the period atwhich the bed dwells at rest, and in this form of my invention advantageis taken of such relatively prolonged or appreciable dwell in order toshift the toothed clutch 29 by the mechanism hereinbefore described sothat it clutches the other of the cylinder driving gears and makes ittemporarily fast to the cylinder driving shaft 22.

As the crank 4- continues its rotation and the bed driving gear 6 andthe reversing roller 14 pass beyond the reverse curved portions 44. 5 ofthe endless bed rack and reversing shoes, the bed 8 is gradually broughtup to speed in the opposite direction to that in which it has beentraveling and the hereinbefore referred to uniform speed is againsecnredwhen the bed driving gear 6 engages the other straight portion of theendless bed rack 7. The crank 1 having made one half a rotation while inengagement with one of the curved portions of the rack, it is againlocked in position by the locking strip 15 engaging with the lookingrollers 16, 1'7 and the said uniform speed is maintained until the bedapproaches the end of it movement in the opposite direction.

Inasmuch as the impression cylinder 43 is driven from the cylinderdriving rack 20 secured to the bed 8, the speed of said cylinder 43 isthereby caused to conform in degree or rate to that of the said bed 8,but the direction of rotation of the said cylinder 43 is the same asbefore due to the other one of the cylinder driving shaft gears havingbeen made fast to the cylinder driving shaft by the toothed clutch 29.

ith each of the forms of my invention I may provide some suitable sheetdelivery although my invention is in no wise limited to such provision.Since, however, the mechanical movement herein disclosed lends itselfparticularly to a sheet delivery, I have provided the same and haverepresented it in connection with that form of my invention shown in thedrawings. I will proceed to describe in detail that selected form ofsheet delivery herein shown without limiting myself thereto.

Referring to Figs. 1 and 3 of the drawing, I have indicated theso-called down tapes at 87. The said tapes carry the sheet in the usualmanner to the usual reciprocatin g delivery carriage which carries thesheet out to piling position on its forward stroke and has the top runof its tapes 89 held in any suitable manner, not herein indicated, onthe return stroke, so that the sheet is driven off onto the pile in amanner not herein necessary more fully to describe.

The sheets are preferably delivered to a table mounted for downwardmovement at the right of Fig. 1 but the same has been omitted from thedrawing for lack of space.

Due to the gradual manner in which the bed 8 is started and stopped atthe ends of its stroke, the delivery carriage, which has approximatelythe same length of stroke as the bed, may be driven from the bed, andthus an exceedingly advantageous sheet delivery is secured.

For this purpose any suitable operative connections may be provided, butherein I have represented a sprocket gear 90 fast upon the auxiliarycylinder driving gear 25 and with which engages a sprocket chain 91horizontally arranged and passing about and driving a similar sprocketgear 92 upon a stud 93 and having fast therewith a gear 7 94: which inturn meshes with a gear 95 fast on a delivery shaft 96. Upon each end ofthe said delivery shaft 96 are sprocket gears 97 about which passsprocket chains 98 that pass about and drive similar sprocket gears99'mounted upon studs 100 and having fast with them the deliverycarriage pinions 101 which mesh with the delivery carriage racks 102,fastened to each side of the delivery carriage 88 thereby causing saidcarriage to be reciprocated upon the carriage tracks.

As the delivery carriage approaches its extreme forward position overthe pile of sheets, the bed is approaching the end of its stroke and asthe bed gradually slows down and stops and dwells momentarily beforestarting back, the delivery carriage 88, inas much as it is driven fromthe bed 8, comes to a full stop gradually and dwells in a like manner.Therefore the sheet is brought gradually to a stop and remains at astandstill for an instant before the carriage starts to roll frombeneath it, thus making it easy to deliver any size sheet accurately tothe pile without adding additional parts to stop the sheet or to forceit down on the pile. In-

asmuch as the front of the carriage clears the tail of the sheet by aconsiderable distance on the back stroke of the carriage, the sheetgiven plenty of time to settle onto the pile of sheets and thereforethere is no danger that the carriage will strike such topmost sheet uponthe next forward stroke of the delivery carriage.

\Vith this long stroke carriage driven directly from the bed of theprinting press, a pile of sheets extending to the floor may beformed byequipping the delivery table (not herein shown) with any Well knownlowering device, also not shown.

The carriage due to being driven from a solid steady driver (the bed)may be given a long stroke, 2'. c. approximately the stroke of the bed.Due to said long stroke the front end of the carriage clears the tailend of the sheet by a considerable distance on the back stroke of thecarriage and hence the sheet has plenty of time to settle.

In the preferred form of my invention,

namely, that shown in the drawings, the action of the loosely mountedrotatable member therein typified as a crank is intermittent, and due toits action with the reverse curve portion of the endless rack andreversing shoes, time is obtained to operate part of the mechanismcontrolling the action of the printing cylinder, so that the surfacespeed of the cylinder may be exactly synchronized to that of the bed,and thus they bothstop and start together at the times that the bed isat the extreme ends of its stroke, and during the printing stroke thesurface speeds of the cylinder and bed are exactly the same and in thesame direction for the whole of the printing stroke from dead center todead center. On the return stroke, while the surface speeds of the saidtwo parts are the same, they are traveling in opposite directions, andtherefore their surfaces must be slightly separated. Such separation iseffected in the usual manner not herein necessary more fully todisclose. The press is therefore what may be defined as a two revolutionstop cylinder printing press.

Having thus described one illustrative embodiment of my invention, Idesire it to be understood that although specific terms are employed,they are used in a generic and descriptive sense and not for purposes oflimitation, the scope of the invention being set forth in the followingclaims:

1. A mechanical movement comprising a reciprocable member, a drivingshaft, a driving member fast on said shaft, a rotatory member concentricwith said shaft, a driving member mounted on said rotatory membereccentrically with respect to said shaft, and having driving relationwith said reciprocable member and with the driving member fast on saiddriving shaft, said parts being constructed, cooperating and operativelyconnected to drive the reciprocable member at a uniform speed during apart of its forward and backward strokes, and to cause it to remainappreciably at rest at the end of each of said strokes.

Q. A mechanical movementcomprising a reciprocable member, a drivingshaft, a driving member fast on said shaft, a rotatory member concentricwith but loose with respect to said shaft, a driving member eccentrically mounted on said rotatory member with respect to said drivingshaft, and having driving relation with said reciprocable member andwith the driving member on said driving shaft, said parts beingconstructed, cooperating and operatively connected to drive thereciprocable member at a uniform speed during a part of its forward andbackward strokes, and to cause it to remain appreciably at rest at'theend of each of said strokes.

3. A mechanical movement com-prising a reciprocable member, a drivingshaft, a driving member fast on said shaft, an intermittently rotatorymember concentric with said shaft, a membermounted on said rotatorymember eccentrioally with respect to said driving shaft and havingdriving relation with said reciprocable member and with the drivingmember on said driving shaft, said parts being constructed, cooperatingand operatively connected to drive the reciprocable member at a uniformspeed during a part o its forward and backward strokes, and to cause itto remain appreciably at rest at the end of each of said strokes.

4. A mechanical movement comprising in combination, a reciprocablemember, driving shaft having a driving gear fast thereon, anintermittently rotatory member loosely mounted upon said shaft and agear carried thereby eccentric with respect to said driving shaft, andhaving meshing relation with said driving gear and with the reciprocablemember, said reciprocable member having formations cooperating with saiddriving gear and with said intermittently rotatory member whereby saidreciprocable member is driven at a uniform speed during a part of itsforward and backward strokes, and whereby it is caused to remainappreciably at rest at the end of each of said strokes.

5. A mechanical movement comprising in combination a reciprocablemember, an end less rack secured thereto, a driving shaft, a drivinggear fast on said shaft, a rotatory member concentric with but loosefrom said shaft, a gear eccentrically mounted on said rotatory memberand meshing with said driving gear and with said endless rack, saidparts being constructed, cooperating and operatively connected to drivethe reciprocable member at a uniform speed during a part of its forwardand backward strokes, and to cause it to remain appreciably at rest atthe end of each of said strokes.

6.- A mechanical movement comprising in combination a reciprocablemember, an endless rack secured thereto, a driving shaft, a driving gearfast on said shaft, an intermittently rotatory member concentric withsaid shaft, a gear eccentri'cally mounted on said rotatory member, anmeshing with said driving gear and said endless rack, said parts beingconstructed, cooperating and operatively connected to drive thereciprocable member at a uniform speed during a part of its forward andbackward strokes, and 100 to cause it to remain appreciably at rest atthe end of each of said strokes.

7 A mechanical movement comprising a reciprocable member, a drivingshaft, a driving member fast on said shaft, a rotatory 105 memberconcentric with said shaft, a driving member eccentrically mounted onsaid rotatory member and having driving rela tion with said reciprocablemember and with the driving member fast on said driving 110 shaft, meansperiodically to lock said rotatory member with respect to the drivingshaft, said parts being constructed, cooperah ing and operativelyconnected to drive the reciprocable member at a uniform speed 115 duringa part of its forward and backward strokes, and to cause it to remainappreci' ably at rest at the end of each of said strokes.

8. A mechanical movement comprising a 0 reciprocable member, a drivingshaft, a driving member fast on said shaft, a rotatory member concentricwith said shaft, a driving member eccentrically mounted on said rotatorymember and having driving rela- 12 tion with said reciprocable memberand with the driving member fast on said driving shaft,'locking meansextending along the path of the reciprocable member periodically to locksaid rotary member with re- 130 spect to the driving shaft, said partsbeing constructed, cooperating and operatively connected to drive thereciprocable member at a uniform speed during a part of its forward andbackward strokes, and to cause it to remain appreciably at rest at theend of each of said strokes.

9. A mechanical movement comprising a reciprocable member, a drivingshaft, a driving member fast on said shaft, a rotatory member concentricwith said shaft, a driving member eccentrically mounted on said rotatorymember and having driving relation with said reciprocable member andwith the driving member fast on said driving shaft, a strip extendinglongitudinally of said reciprocable member and adapted periodically tolock said rotatory member by engagement therewith, said parts beingconstructed, cooperating and operatively connected to drive thereciprocable member at a uniform speed during a part of its forward andbackward strokes, and to cause it to remain appreciably at rest at theend of each of said strokes.

10. A mechanical movement comprising a reciprocable member, a drivingshaft, a driving member fast on said shaft, a rotatory member concentricwith said shaft, a driving member eccentrically mounted on said rotatorymember and having driving relation with said reciprocable member andwith the driving member fast on said driving shaft, means whereby saidrotatory member is locked from rotation during travel of saidreciprocable member in each direction, and is permitted to make one halfrotation when unlocked, said reciprocable member having reversely curvedend portions cooperating with the said driving member, whereby to effectthe driving of said reciprocable memher at a uniform speed during a partof its forward and backward strokes and whereby to cause saidreciprocable member to remain appreciably at rest at the end of each ofsaid strokes.

11. A mechanical movement comprising in combination, a reciprocablemember, a rack carried thereby, a driving shaft, a driving gear fast onsaid shaft, a rotatory member concentric with but loose with respect tosaid shaft, a gear eccentrically mounted on said rotatory member. andmeshing with said driving gear and said rack, means periodically to locksaid rotatory member with respect to said driving shaft, said parts being constructed, cooperating and operatively connected to drive thereciprocable member at a uniform speed during a part of its forward andbackward strokes, and to cause it to remain appreciably at rest at theend of each of said strokes.

12. A mechanical movement comprising'a rack, a driving shaft, a drivinggear fast thereon, a crank loose upon said shaft, a gear eccentricallycarried by said crank, and meshing with said rack and said driving gear,means whereby said crank is locked with respect to the driving shaftduringthe uniformspeed travel of said rack in opposite directions but isunlocked therefrom while said rack is being brought to a position ofrest and is starting therefrom, said parts being constructed,cooperating and operatively connected to drive the reciprocable memberat a uniform speed during a part of its forward and backward strokes,and to cause it to remain appreciably at rest at the end of each of saidstrokes.

' 13. A printing press comprising in combination, a reciprocable bed,means to drive said bed in each direction including means to start thebed from a position of rest, to bring it gradually to desired uniformspeed, to maintain said uniform speed throughout the major portion ofthe movement of the bed in both directions of reciprocation, andgradually to bring it to a position of rest, a cylinder rotatable in onedirection only, and means for causing the surface speed of the cylinderto conform in degree with that of the bed at all times during thedescribed stroke of the bed.

14. A printing press comprising in combination, a reciprocable bed,means to drive said bed in each direction, means to cause an appreciablerest after each movement of the bed, and means to start the bed from theposition of rest to bring it gradually to desired uniform speed, tomaintain said uniform speed, and gradually to bring it to a position ofappreciable rest, a cylinder rotatable in one direction only. and meansto drive said cylinder from said bed whereby the surface speed of thecylinder conforms in degree with that of the bed at all times during thedescribed stroke of the bed.

15. A printing press comprising in combination, a reciprocable bed, anendless rack fast thereon, a cylinder having a gear, a driving shaftoperatively connected to said cylinder gear, a driving gear fast on saiddriving shaft, a rotatory member loosely mounted on said shaft, a geareccentrically mounted on said rotatory member and meshing with saiddriving gear and said endless rack, said parts being constructed,coiiperating and operatively connected to drive the reciprocable memberat a uniform speed during a part of its forward and backward strokes,and to cause it to remain appreciably at rest at the end of each of saidstrokes.

16. A printing press comprising in combination, a reciprocable bed, anendless rack fast thereon, a cylinder having a gear, a driving shaftoperatively connected to said cylinder gear, a driving gear fast on saidshaft, an intermittently rotatory member driving shaft operativelyconnected to said cylinder gear, a driving gear fast on said shaft, acrank loose upon said shaft, a gear eccentrically mounted on said crankand meshing with said driving gear and with said endless rack, saidparts being constructed, cooperating and operatively connected to drivethe reciprocable member at a uniform speed during a part of its forwardand backward strokes, and to cause it to remain appreclably at rest atthe end of each of sa1d strokes.

' 18. A printing press comprising in combi nation, a reciprocable bed,an endless rack fast thereon having reversely curved ends providing forappreciable period of rest, a cylinder-having a gear, a driving shaftoperatively connected to said cylinder gear, a driving gear fast on saidshaft, a crank loose upon said shaft, a gear eceentrically mounted onsaid crank, and meshing with said driving gear and with said endlessrack, and means for periodically locking said crank with respect to saiddriving shaft.

19. A printing press comprising in combination, a reciprocable bed, anendless rack fast thereon having reversely curved ends providing forappreciable period of rest, a cylinder having a gear, a driving shaftoperatively connectedto said cylinder gear, a driving gear fast on saidshaft, a crank loose upon said shaft, a gear carried by said crank andmeshing with said driving gear and with said endless rack, and means tolock said crank with respect to the driving shaf Y during the uniformspeed portion of the strokes of said bed. 20. A printing presscomprising in combination, a reciprocable bed,.an endless rack fastthereto having reversely curved ends providing for appreciable period ofrest, a driving shaft, a driving gear fast on said shaft, anintermittently rotatory member concentric with said. shaft, a geareccentrically mounted on said rotatory member and meshing with saiddriving gear and with said endless rack, means periodically to lock saidrotatory member with respect to said driving shaft, said parts beingconstructed, cooperating and operatively connected to drive thereciprocable member at a uniform speed during a part of its forward andbackward strokes, and to cause it to remain appreciably at rest at theend of each of said strokes.

21. A printing press comprising in combination, a reciprocable bed,means to drive said bed in each direction, means to cause an appreciablerest after each movement of the bed, and means to start the bed from theposition of rest to bring it gradually to desired uniform speed, tomaintain said uniform speed and gradually to bring it to a position ofappreciable rest, a cylinder driven in one direction only, and sheetdelivery means driven from said bed.

22. A printing press comprising in combination, a reciprocable bed,means to drive said bed in each direction including means to startthebed from a position of appreciable rest to bring it gradually to thedesired uniform speed, to maintain said uniform speed throughout themajor portion of the movement of the bed in both directions ofreciprocation, and gradually to bring it to a position of appreciablerest, a cylinder, means whereby the surface speed thereof conforms indegree to that of the bed, and sheet delivery means driven from saidbed.

23. A printing press comprising in com bination, a reciprocable bed,means to drive said bed in each direction, means to cause an appreciablerest after each movement ofthe bed, and means to start the bed from theposition of rest to bring it gradually to desired uniform speed, tomaintain said uniform speed and gradually to bring it to a position ofappreciable rest, reciprocable sheet delivery means, a cylinder drivenin one direction only, means whereby the surface speed thereof conformsto that of the bed, and means for driving said delivery means from saidbed, and for bringing said delivery means gradually to a state of rest.

2%. A printing press comprising in combination, a reciprocable bed,means to drive saidbed in each direction, means to cause an appreciablerest after each movement of the bed, and means to start the bed from theposition of rest to bring it gradually 0 de sired uniform speed, tomaintain said uniform speed and gradually to bring it to a position ofappreciable rest, a cylinder rotatable in one direction only, means forcausing the surface speed of the cylinder to conform in degree with thatof the bed at all times during the described stroke of the "bed. sheetdelivery means, and operative connections between said sheet deliverymeans and said bed.

2,5. A printing press comprising in combination, a reciprocable bed,means to drive said bed in each direction including an endless rack uponsaid bed having reversed curved ends 4A1, 44:, a driving shaft, adriving gear fast thereon, a crank loose upon said shaft, a geareccentrically carried by said crank and meshing with said rack and withits reversed curved ends and also meshing with said driving gear and alongitudinally extending strip 15 cooperating with said crank to lockthe same with respect to the driving shaft during the uniform speedtravel of said rack in opposite directions, but permitting the unlockingof the crank therefrom while the rack is being brought to positions ofappreciable rest at said reversed curved ends 44, 44;. i

26. A printing press comprising in combination, a reciprocable bed, anendless rack carried thereby having reversed curved ends 44, and havingreversed curved reversing shoes 9, 10, 12, 13, )roviding positions ofappreciable rest, a driving shaft, a driving gear fast on said shaft, arotatory member concentric with but loose with respect to said shaft, agear eccentrically mounted on said rotatory member and meshing with saiddriving gear and with said rack, and a longitudinally extending strip 15with which said rotatory member is operatively engaged during travel ofsaid reciprocable member in each of two opposite directions butpermitting disengagement therefrom while said gear eccentrically mountedupon the rotatory member is engaged with the reversed curved endportions of said rack.

27. A printing press comprising in combination, a reciprocable bed, acylinder rotatable in one direction only and means for causing thesurface speed of the cylinder to conform in degree with that of the bedthroughout the entire stroke of the bed, and including means whereby thebed is driven at a uniform speed throughout a portion of its movementsin both directions of reciprocation.

. 28. A printing press comprising in combination, a reciprocable bed,means to drive said bed in each direction, means to cause an appreciablerest after each movement of the bed, and means to start the bed from theposition of rest, to bring it gradually to desired uniform speed, tomaintain said uniform speed through a portion of the movement of the bedin both directions of reciprocation, and gradually to bring it to aposition of rest, a cylinder, and means for causing the surface speed ofthe cylinder to conform in degree with that of the bed at all timesduring the described stroke of the bed.

29. A printing press cOmpriSing in combination, a reciprocable bed,means to drive said bed in each direction, means 'to cause anappreciable rest after each movement of the bed, and means to start thebed from the position of rest, to bring it gradually to desired uniformspeed, to maintain said uniform speed throughout a portion of themovement of the bed in both directions of reciprocation, and graduallyto bring it to a position of rest, a cylinder rotatable 111 onedirection only, and means for causing the surface speed of the cylinderto conform in degree with that of the bed at all times during thedescribed stroke of the bed.

30. A printing press comprising in com bination, a reciprocable bed,means to drive said bed in each direction, means to cause an appreciablerest after each movement of the bed, and means to start the bed from theposition of rest, to bring it gradually to desired uniform speed, tomaintain said uniform speed throughout a portion of the movement of thebed in both directions of reciprocation, and gradually to bring it to aposition of appreciable rest, a cylinder rotatable in one directiononly, and separable from the bed during the non-active stroke of thebed, and means to drive said cylinder from said bed whereby the surfacespeed of the cylinder conforms in degree with that of the bed at alltimes during the described stroke of the bed.

31. A printing press comprising in combination, a reciprocable bed,means to drive said bed in each direction, means to cause an appreciablerest after each movement of the bed, and means to start the bed from theposition of rest, to bring it gradually to desired uniform speed, tomaintain said uniform speed throughout a portion of the movement of thebed in both directions of reciprocation, and gradually to bring it to aposition of appreciable rest, a cylinder rotatable in one directiononly, and means for causing the surface speed of the cylinder to conformin degree with that of the bed at all times during the described strokeof the bed, and including means to bring said cylinder to a position ofrest at each end of the stroke of the bed.

32. A printing press comprising in combination, a reciprocable bed,means to drive said bed in each direction, means to cause an appreciablerest after each movement of the bed, and means to start the bed from thepo sition of rest, to bring it gradually to desired uniform speed, tomaintain said uniform speed throughout a portion of the movement of thebed in both directions of reciprocation and gradually to bring it to aposition of appreciable rest, reciprocable sheet delivery means, andoperative connections between said means and said bed to drive saidmeans at the same rate of speed as said bed and gradually to bring saiddelivery means to a state of rest at the end of the outward stroke ofsaid delivery means.

33. A printing press comprising in combination, a reciprocable bed,means to drive said bed in each direction, means to cause an appreciablerest after each movement of the bed, and means to start the bed from theposition of rest, to bring it gradually to desired uniform speed, tomaintain said uni form speed throughout a portion of the movement of thebed in both directions of reciprocation and gradually to bring it to aposition of appreciable rest, a cylinder, means for causing the surfacespeed of the cylinder to conform in degree with that of the bed at alltimes during the described stroke of the bed, sheet delivery means andmeans to drive said delivery means from said bed.

34:. A mechanical movement comprising a driving shaft having a drivingmember, a reciprocable member, and means associated with and operativelyconnecting said driving member and said reciprocable member andincluding a member "concentric with said driving shaft and having a parteccentric with respect to the driving shaft, to effect the driving ofthe latter at a uniform speed during a part of its forward and backwardstrokes and to cause it to remain appreciably at rest at the end of eachof said strokes.

35. A printing press comprising in combination, a driving shaft having adriving member, a reciprocable bed, and means associated with andoperatively connecting said driving member and said reciprocable bed andincluding a member concentric with said driving shaft and having a parteccentric with respect to the driving shaft, to effect driving of saidbed at a uniform speed during a part of its forward and backward strokesand to cause it to remain appreciably at rest at the end of each of saidstrokes.

In testimony whereof, I have signed my name to this specification.

WILLIs K. HODGMAN, JR.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents, Washington, D. G.

